An implantable device for shaping an intracorporeal wall includes: an elongate element which has a first end, a second end and a central filiform region between the first end and the second end； and a blocking member. The elongate element is mobile in relation to the blocking member between an unlocked position away from the blocking member and a locked position on the blocking member, in which the elongate element is connected to the blocking member. The blocking member includes a mechanism for selective adjustment of the length of the central region protruding towards the second end from the blocking member.
